Bruno Labbadia's men gained momentum and pushed Braunschweig onto the back foot. Berlin's efforts paid off at the half-hour mark after Matheus Cunha had all the time and space to curl the equalizer into the far post corner.
The opening game in Ipurua is followed by the delayed match in Granada, which is a repeat of the last game of last season. That match saw Granada beat an Athletic side with nothing to play for 4-0 in order to qualify for Europe for the first time in the club's history.
Elsewhere, Sheffield United impressed in their return to the top-flight last season and now need to repeat that in what could be a tough second season, Burnley will continue to present teams with a physical challenge under Sean Dyche, while Danny Ings' goals will play a major role in determining Southampton's fate.
Everton fans will be looking for improvement under experienced coach Carlo Ancelotti and the former Chelsea and Real Madrid boss has added James Rodriguez to his squad from Madrid in a move that should bring a bit of magic to his side if James can find his feet in the Premier League.
Henan Jianye ranked at the bottom among the eight teams in group A with only one win and three draws after 10 rounds.
But in the third and fourth sets, Zverev's play became sloppy while Thiem started to gain momentum and applied more pressure to Zverev's serve. The Austrian star finally got back into the match after taking the two sets and evened the gap.
The French Ligue 1 defending champions added that the deal included a purchase option when the loan ends next summer.
Elsewhere, Bayer Leverkusen cruised into the next round as Nadiem Amiri's brace rounded off the 7-0 goal fest against Eintracht Norderstedt.
Leicester City were last season's surprise package with their fifth place finish and the challenge for coach Brendan Rodgers will be to get near repeating that, and to get close he needs Jamie Vardy to keep hammering home the goals.
Luneng went ahead in the 19th minute when their striker Duan Liuyu miskicked the ball which flew into Pelle's way, and the Italian swept it in from a close range.
Stage One will be played across two blocks of eight days: September 13-20 and September 28-October 5. Enditem